I24 NEW YORK STATE MUSEUM 
faces and the scalenohedron N: (5382) is frequently absent from crystals 
of this type. Pyrite inclusions are present on, or just below, the surface 
8. (0112), as distinct bands outlining the symmetry along the edges of 
p. (1011) and often terminating in brushes; in some cases noted, these bands 
were connected by lateral extensions along the basal edges of p. (1011). 
Phantoms of opaque white calcite which are shown on the cleavage and 
take the form of the rhombohedron p. (1011) suggest the secondary deri- 
vation of this type from a simpler primitive crystal. Another combination 
clearly referable to this type is shown in figure 4. Crystals of this phase 
are rhombohedral-scalenohedral in habit, having for dominant forms the 
negative rhombohedron 38. (0112), the positive rhombohedron z. (28.0.28.1) 
and the positive scalenohedron » (10.3.13.2). Striated planes of the posi- 
tive scalenohedron L: (17.9.26.8) are present in small development. The 
presence of the scalenohedron » seems to connect this type with the combi- 
nations previously noted from the vicinity of Catskill, an analogy which is 
borne out by the presence of the scalenohedron H: of the zone [1011.1120] 
in both occurrences. 
Type VIII [pl. 27, fig. 5]. Crystals of this type are scalenohedral 
in habit, of rhombohedral aspect and combine forms of the zone 
[0112.1011.1120]. Of these the faces composing the middle band are those 
of the scalenohedron D: (6175) while those which, with the negative rhombo- 
hedron 8. (0112), form the termination are built-up faces composed of the 
rhombohedron p. (1011) and the scalenohedron f:(7.2.9.11) though the 
presence of vicinal planes and striations render the measurements obtained 
from these faces vague and the scalenohedral form uncertain. The zonal 
edges of D: are beveled by narrow bright planes of the scalenohedron 
G:(7295). The presence of pyrite inclusions arranged on the phantom 
faces of the rhombohedron p. (1011) suggests that crystals of this type were 
produced by a “building-up”’ process from secondary calcareous solutions 
upon primitive, rhombohedral crystals. Small amounts of galena and 
sphalerite were found associated with this phase of the Rondout calcite. 
Type IX [pl. 27, fig. 6]. The rhombohedron p. (1011) which gives 
